Blower



Sept. 27, 1932. H. MEA-CHEM BLOWER original Filed sept. 25', 1930 2Sheets-sheet X I H .IE 7 fo Sept 27, 1932- v H. MEACHEM 1,880,101

BLOWER Original Filed Sept. 25. 1930 ZSheets-Sheet 2` Patented Sept. 27,1932 i i' i i entre!) VSTATES PA'renr HARRY IVEAOHEM, 0F TEANECK, NEWJERSEY, ASSGNOR TO TODD `DRY DOCK, ENGINEERING @t REPAIR GORPORATON, OFBROOKLYN, YNEVI YORK VBLOWER Application inea september 25,1930, serialNo. 484,358. Renewed June'ae, 193e.

This invention relates to Vrotary blowers lates to means in conjunctionwith a'blower for use in supplying air or other fluid under for thedelivery o@ iiuid therefrom in a whirlpressure in a whirling stream, andmy iining Column, without loss of pressure due to proveniente aredirected particularly to changing the direction of the iuid flow.

s; means in a blower that efect a conversion As an example of means forcarrying out ae of the centrifugally directed iiuid iiow into a thisinvention I have illustrated herein va whirling column without loss ofvelocity casing having the front plate l, the rear Such `as is nowinvolved in changing the wall 2, and the baffle 3 which is secured todirection of the fluid flow delivered by the j studs 4 projectinginwardly from wall 2.

blowers in use, Alsothere is vshown the motor l5 whose shaft .fn

l/Vith this and other objects in View, my 6 engages vthe hub 7 of thefan or 'irnpellerl invention comprises a blower whose impeller Said fanis here represented as coinposedof a blades are confined between twoopposed reillWad disk 8 and EL OlWld dSl 9, 'ChSSG disl-:s that aresuitably spaced apart to condisks'being in parallel, spaced relation,and tain said inipeller blades whereby the air containing between them aseries of curved which enters centrally between the disks is impellerblades l0. Vfhile the forwarddisl: directed with centrifugal action,radially V9 is of equal diameter with the rearward disk from theimpeller into the casing of the 8, said forward disk has a centralopening,

. blower. Y Y indicated at 1l, for the entry oi' iiuid which Also as vanessential feature of my invenis admitted thereto as through Vtheregister tion, the blower casing is provided, at one 12. The hub 7,which constitutesrthe root side thereof opposed to the outlet side, withportion of rearward disk 8, iS COIlveXed at a series of curved guides,the series having V18 to Ouide the iiOW Of duid HO the radid the generalJform of a stepped or sectional SplCe leJWe/Il dlSkS 8, 9.

i annulus,each guide, or section ofthe annulus, NOW ithas beenappreciated by me that 7s having curved characteristics which respecthevelOClty of air or other Huid that iS tively, inconjunction with thesurrounding hIYQWIl Wlh Centrifugal OlCe aganSt the VWall of the blowerserve to turn the air stream peripheral Wall 14 0f a blower Casing, Such'se path in which it exerts radial force, into a quent passage over thebaiie and toward' the ec circular, rearwardly directed path for de-Centrally' disposed eXit opening 15 in the Vlivery in a hollow whirlingcolumn, rearward wall 2, so that the pressure that has j Other featuresand advantages of my inbeen generated by the impeller is ccnsidera- Avention will hereinafter appear. bly lessened', with :a consequent loss.of et 35 In the drawings: lciency in the dehveredproduct. This is 'g5Figure l is a side sectionalview of a blower du@ t0 the fat that the@Cute ingle fequed equipped With my improved mpeuer and t0 be OllOWGClby the .fllllCl SXBMH inflow/lng fluid 110W directing means, between thebaiiie periphery and the periph- Fig. 2 is a sectionon the line 2 2 ofFig. 1, ,eral Wall lit 0f the Csmg 'exercises a brak' die' lookingtoward the back of the fan casing, 111g eect upon its Speed 0f tllwlthearrow indicating the counter-clockwise Theefo'@ my IHVQDOD.COHlDlehe'fdS l rotation of the impeller blades means'. of easementVfor this retarding inu- Fig. 3 is a section on the line 3-3 0f Fig,lence and consists of a curved guidethat gradv i 2, and ually translatesthe radial fluid flow force Y Figs. 4, 5 and 6, taken respectively onthe created by the impelle'r into awhirling force an lines -ll, 5 5 and6 6 0f Fig, 3 .show of flowing fluid with its aXisdirected at rightdierent gradients represented in one of the angles to the plane of theradial i'orce. like series of venes-constituting the rair flow The`curved, guide referred to isV in the guiding annulus. form offanannulus composed of the steps As has been promised, my invention reorsegments 416, disposed between the periphery of the impeller and theinner surface of casing wall 14. Said segments therefore are containedwithin the circumferential space into which induced fluid is pressed bythe impcller blades. Each of the segments, which are identical in form,and may be described as of curved form, wedge shaped at both ends, hasits entering edge 17 lying close to the forward wall 1 of the casing,whence it rises in a gradualcurve that is convex in cross-section, toits delivery point, where the segment has broadened out to lie closeagainst the casing wall 14. The delivery edge 18 of each segment isadjacent the leading edge ofa succeeding segment.

The segments may be said to have partially spiral surfaces betweenvtheir leading and delivery edges that oonductfthe fluidiiow in aneasyturning movement to change its radial direction into rearward direction,the change being effectedso smoothly, without abruption, that theinitial velocity of the flowing fluid is in no way impaired.

As an example of one of the many'uses to which my improved blower may beapplied, it is herein represented in association with a Toddrotary fueloil burner, having the atomizr 19, air nozzle 20 into which air isdelivered in a whirling column, Venturi cone 21, and the .other usualparts of this burner structure which need not be enumerated here sincethey form no part of my invention.

Variations within the spirit andiscope Vof my invention are equallycomprehended by the foregoing disclosure. .Y

I claim:

1. The combination with a blower having a casing and an impellertherein, of a series ofguide members disposed annularly within thecasing, beyond the Yradius of the impeller, to turn the radiallydirected flowing uid into a rearwardly directed whirling fluid into arearwardly directed -whirling column, said guide members presentingsurfaces that are convex in cross-section and being partially spiral inform and wedge shaped at both ends, with their entering edges lyingparallel with the forward wall of the casing, and their delivery edgeslying parallel with the peripheral wall of the caslng. l

4. TheV combination with a blower having a. casing and animpellertherein, of a series of guide members disposed annularly withinthe casing, beyond the radius of the impeller, to turn the radiallydirected flowing liuid into a rearwardly directed whirling column, saidguide members presenting 'surfaces that are convex in cross-section andcasing, and their deliveryedges lying against the peripheral wallofthecasing.

New York, N. Y., September 23, 1930.

HARRY 'MEACHEM ing column, said guide membersbeing partially spiral inform -andwedge shaped at both ends with their entering edges lyinglparallel with the forward wall of the casp' ing, and their deliveryedges ylying parallel with the peripheral wall of the casing.

2. The combination Vwith a blowerv having a casing and an impellertherein, of a se- .ries of guide members disposed annularly within thecasing, beyond the radius of the impeller, to'turn the radially directedflowing fluid into a rearwardly directed whirling column, said guidemembers being partially spiral in form' and wedge shaped at both ends,with their entering edges lying against the forward wall of the casing,and their delivery edges Vlying against the peripheral wall of thecasing.

3. The combination wit ing a casing and an impeller therein, of a h ablower havi series of guide members disposed annularly within thecasing, beyond the radius of the impeller, to turnv the radially:directed {iow-

